Centralite

Ethyl centralite is an organic compound. Its chemical name is N, -diethyl-N, -diphenylurea. The molecular formula of ethyl centralite is . This compound has important uses in industry and forensics. The structure of ethyl centralite includes two phenyl groups (aromatic rings) attached to a central urea group. There are also ethyl groups ( ) bound to the nitrogen atoms of the urea. Its primary use is as a stabilizer in double and triple-base smokeless powders.

Ethyl centralite is an organic compound. Its chemical name is N, -diethyl-N, -diphenylurea. The molecular formula of ethyl centralite is . This compound has important uses in industry and forensics. The structure of ethyl centralite includes two phenyl groups (aromatic rings) attached to a central urea group. There are also ethyl groups ( ) bound to the nitrogen atoms of the urea. Its primary use is as a stabilizer in double and triple-base smokeless powders. ==History== In the 19th century chemists identified that nitrocellulose can destroy itself with the help of nitrogen oxides separating from it at storage, and tried to find bases which might capture those oxides. Urea was used for stabilizing celluloid in the 19th century (and even in early American military powders), but like other water-soluble bases, it also attacks nitrocellulose, so German chemists substituted hydrogen atoms with nonpolar organic radicals to diminish this effect. ==Naming== The term "Centralite" was originally applied to dimethyldiphenylurea developed about 1906 at the German private military-industrial laboratory (Center for Scientific-Technical Research) in Neubabelsberg as a deterrent coating for smokeless powder in military rifle cartridges. Thereafter, all hydrocarbon-substituted symmetrical diphenyl urea compounds used as smokeless powder deterrents (or moderants) were called centralites after the laboratory. The preferred ethyl centralite became known as Centralite 1 and the original methyl centralite was identified as Centralite 2. Butyl centralite was also used as a celluloid plasticizer. ==Comparison with analogs== Centralite-2, also known as sym-dimethyldiphenylurea, is a methyl analog that is moderately utilized overseas. Though they are likewise excellent plasticizers, centralites are thought to be a little less effective stabilizer than 2-Nitrodiphenylamine. To benefit from their plasticizing qualities, they are commonly employed in propellants at higher fractions than diphenylamines. ==References==

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